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Seoul, South Korea

Seokyeong University is a private university in South Korea. The campus is located in 16-1 Jeongneung-dong, Seongbuk-gu, Seoul.The university is aiming at educating the students to be the leading people with wisdom , benevolence and valor . Wikipedia.

Kim N.-S.,University of Texas at El Paso | Han K.N.,Seokyeong University
Journal of Applied Physics

Direct write technology using special inks consisting of finely dispersed metal nanoparticles in liquid is receiving an undivided attention in recent years for its wide range of applicability in modern electronic industry. The application of this technology covers radio frequency identification-tag (RFID-tag), flexible-electronics, organic light emitting diodes (OLED) display, e-paper, antenna, bumpers used in flip-chip, underfilling, frit, miniresistance applications and biological uses, artificial dental applications and many more. In this paper, the authors have reviewed various direct write technologies on the market and discussed their advantages and shortfalls. Emphasis has given on microdispensing deposition write (MDDW), maskless mesoscale materials deposition (M3D), and ink-jet technologies. All of these technologies allow printing various patterns without employing a mask or a resist with an enhanced speed with the aid of computer. MDDW and M3D are capable of drawing patterns in three-dimension and MDDW, in particular, is capable of writing nanoinks with high viscosity. However, it is still far away for direct write to be fully implemented in the commercial arena. One of the hurdles to overcome is in manufacturing conductive inks which are chemically and physically stable, capable of drawing patterns with acceptable conductivity, and also capable of drawing patterns with acceptable adhesiveness with the substrates. The authors have briefly discussed problems involved in manufacturing nanometal inks to be used in various writing devices. There are numerous factors to be considered in manufacturing such inks. They are reducing agents, concentrations, oxidation, compact ability allowing good conductivity, and stability in suspension. © 2010 American Institute of Physics. Source

Kim S.-D.,Seokyeong University
Food Chemistry

A bioassay-guided fractionation of an ethanol extract of Buthus martensi Karsch led to the isolation of a potent α-glucosidase inhibitor (compound S). The structure was elucidated as a novel β-carboline glucoalkaloid, harmanyl β-d-glucopyranoside, on the basis of spectral data, including 1H NMR, 13C NMR, 1H-1H COSY, NOESY, and HMBC. Compound S showed potent inhibitory activity against α-glucosidase, with an IC50 value of 24 μM. A Lineweaver-Burk plot indicated that its inhibition of α-glucosidase was uncompetitive, with a Ki value of 16.1 μM. © 2012 Elsevier Ltd. All rights reserved. Source

Yoo J.,Hanyang University | Kwon H.-H.,Chonbuk National University | Kim T.-W.,Hanyang University | Ahn J.-H.,Seokyeong University
Journal of Hydrology

Analyses of drought frequency require long-term historical data to ensure reliable quantile estimates. Estimation of quantiles is difficult, because drought extremes are rare by definition, and the durations of extremes are often too short for reliable point frequency analysis. Regional frequency analysis provides a solution for these problems by using data from multiple sites, provided the sites are homogeneous, and this type of analysis yields appropriate estimates of quantiles at sites of interest. This study aims to develop a practical drought frequency analysis method based on a bivariate distribution by incorporating regional drought attributes that are associated with drought frequency (e.g., duration and severity). This study employed a kernel density function to describe joint probabilistic behavior of drought. Given the proposed approach, we estimated return periods according to the most severe drought events on record at each site, and ultimately assess the risks for occurrence of droughts exceeding the most severe droughts over the next 10, 50, 100, and 150. years. © 2011 Elsevier B.V. Source

Son Y.,Dongguk University | Lee Y.,Seokyeong University
Communications in Computer and Information Science

For each platform, for smart phone contents, a unique development environment exists and thus suitable development methods and development languages must be used for each platform. A problem of this development environment is that when contents are created for a number of platforms, an increase in expenses occurs. SVM(Smart Virtual Machine) is a virtual machine solution which is being developed to overcome this problem by using SIL(Smart Intermediate Language) as an intermediate language. SIL is capable of accommodating ISO/IEC C++, Java, Objective-C and other object-oriented programming. In this paper, the Objective-C compiler for the virtual machine is designed and virtualized which creates stack based virtual machine codes, not objective codes when using contents previously developed for the use on other platforms. © 2011 Springer-Verlag. Source

Lee Y.S.,Seokyeong University | Son Y.S.,Dongguk University
International Journal of Smart Home

In the existing smart devices, the contents for each platform there are a unique development environment, and thus are developed in a suitable method and the development of language is also different. These issues cause additional costs when developing the contents on various target platforms it is impossible to make the contents compatible on the various devices or platforms. Proposed The Smart Virtual Machine (SVM) based on the language independent intermediate language is a newly developed virtual machine solution which is aimed towards solving these problems. It uses an intermediate language, the Smart Intermediate Language (SIL), which can cover the object oriented languages such as C++, Java, Objective C and more. In this paper, we deal with a virtual machine, SVM, based on stack and capable of being run on various smart devices. SVM receives a SIL code which is semantically equivalent to a program created with different languages and interprets it based on stack on a software level. Then it runs the programs so that specific smart device operation systems and devices can load them and therefore have the advantage of being platform independent. Source

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